/*
 * Copyright IBM Corp. and others 2007
 *
 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which accompanies this
 * distribution and is available at https://www.eclipse.org/legal/epl-2.0/
 * or the Apache License, Version 2.0 which accompanies this distribution and
 * is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * This Source Code may also be made available under the following
 * Secondary Licenses when the conditions for such availability set
 * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
 * General Public License, version 2 with the GNU Classpath
 * Exception [1] and GNU General Public License, version 2 with the
 * OpenJDK Assembly Exception [2].
 *
 * [1] https://www.gnu.org/software/classpath/license.html
 * [2] https://openjdk.org/legal/assembly-exception.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
 */
package com.ibm.j9tools.om;

import java.text.MessageFormat;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

/**
 * Verifier class to check the existence of the sources in a given {@link ISourceContainer}.
 * 
 * @author	Gabriel Castro
 * @author	Han Xu
 */
public class SourceVerifier {
	private final ISourceContainer sourceContainer;
	private final Set<String> sources;

	/**
	 * Creates a {@link SourceVerifier} for the given container and valid sources.
	 * 
	 * @param 	sourceContainer		the container to be verified
	 * @param 	sources				the valid sources from the container's build-info
	 */
	public SourceVerifier(ISourceContainer sourceContainer, Set<String> sources) {
		this.sourceContainer = sourceContainer;
		this.sources = sources;
	}

	/**
	 * Verifies the sources and returns errors when appropriate.
	 * 
	 * @return	the errors associated with the given {@link ISourceContainer}
	 */
	public Collection<OMException> verify() {
		Collection<OMException> errors = new HashSet<OMException>();

		for (Source source : sourceContainer.getLocalSources().values()) {
			if (!sources.contains(source.getId())) {
				errors.add(new InvalidSourceException(MessageFormat.format(Messages.getString("SourceVerifier.invalidSource"), new Object[] { source.getId() }), source)); //$NON-NLS-1$
			}
		}

		return errors;
	}

}
